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Detecting 1/10th scaled structures in dielectric media using monostatic X-band radar scattering measurements
2000
Image Reconstruction from Incomplete Data
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in various types of soil using a l-GHz ground penetrating radar by establishing a 1/10th-scale laboratory environment with two spot-focussing X-band (10-GHz) lens antennae and an HP85 lOB Network Analyzer ...
The monostatic X-band measurements were acquired in an anechoic environment, and digital images of the backscattered radar data from the 1/10th-scale composite scenes were processed using inverse synthetic ...
Robert Giles, for their support ofthis research. This project was funded by the National Ground Intelligence Center. ...
doi:10.1117/12.409277
fatcat:i2hlcxuwwbdixbs4lfwovmgnla
Overview of the D3R Observations during the IFloodS Field Experiment with Emphasis on Rainfall Mapping and Microphysics
2015
Journal of Hydrometeorology
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An overview of the D3R's calibration and observations is presented. A method for attenuation correction of Ka-band observations using Ku-band results is introduced. ...
Dual-frequency ratio estimates in stratiform rain and ice are presented and compared with theoretical values. ...
The authors acknowledge the support of the GPM program, David Wolff and David Marks for NPOL support, and Mathew Schwaller and Walter Petersen for deployment and logistics support. ...
doi:10.1175/jhm-d-15-0023.1
fatcat:qmntpgrvxnfmhfs4jogds5y3ba
Analysis of a Dynamic Calibration Target for Through-Wall and Through-Rubble Motion Sensing Doppler Radar
2021
Instruments
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The aspect-independence of a sphere allows for more accurate and repeatable calibration of a radar than using a nonspherical calibration artifact. ...
For Doppler radar testing, it is desired to apply these calibration advantages to a dynamically expanding-and-contracting sphere-like device that can emulate motions of the human body. ...
Calibration Sphere for Mimicking Human Radar Cross Section
Calibration
The PEC Sphere ...
doi:10.3390/instruments5040037
fatcat:sjtzq6jitfflxcdtjzstdtm5b4
Radar/rain-gauge comparisons on squall lines in Niamey, Niger for the AMMA
2010
Quarterly Journal of the Royal Meteorological Society
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(The sphere calibration and the Tropical Rainfall Measuring Mission TRMM -radar calibration are inconsistent at the 1-2 dB level for unknown reasons.) ...
Massachusetts Institute of Technology C-band radar observations are integrated with rainfall measurements from an extensive network of gauges in Niamey, Niger, West Africa, for the African Monsoon and ...
Discussions of a more general nature on radar/gauge comparisons with D. Atlas, P.Austin, S.Geotis (deceased), ...
doi:10.1002/qj.548
fatcat:4mia3bnkp5fizmirlf6qpwmeci
High-precision RCS measurement of aircraft's weak scattering source
2016
Chinese Journal of Aeronautics
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Secondly, we carried out the spectral transform of the reflectivity distribution and eventually obtained the RCS of the weak scattering source through calibration. ...
This paper proposes separating and extracting the two-dimensional (2D) reflectivity distribution of the weak scattering source with the microwave imaging algorithm and spectral transform so as to enhance ...
Acknowledgements This study was co-supported by the National Natural Science Foundation of China (Nos. 61201320, 61371023) and the Fundamental Research Funds for the Central Universities of China (No. ...
doi:10.1016/j.cja.2016.03.003
fatcat:q43xmgjij5cypcpq7lm2cedeiq
Low-Cost CW-LFM Radar Sensor at 100 GHz
2013
IEEE transactions on microwave theory and techniques
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This paper presents a V^-band high-resolution radar sensor for short-range applications. ...
Low-cost technologies have been properly selected in order to implement a versatile and easily scalable radar system. ...
The measurement of a target with known radar cross section (RCS), such as a metallic sphere, is suitable for measuring the PSF. ...
doi:10.1109/tmtt.2012.2235457
fatcat:3fjyj2pftnhpnpajyhis5ld7vi
3D imaging by fast deconvolution algorithm in short-range UWB radar for concealed weapon detection
2013
International journal of microwave and wireless technologies
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(ultra-wideband) radar with synthetic or real-array aperture is proposed. ...
3D imaging by fast deconvolution algorithm in short-range UWB radar for concealed weapon detection timofey savelyev 1,2 and alexander yarovoy 1 A fast imaging algorithm for real-time use in short-range ...
Figure 2 illustrates the efficiency of deconvolution for signals acquired from a small metal sphere and a metal gun, more specifically 1% error and 35% instability. ...
doi:10.1017/s1759078713000251
fatcat:yuzda2ervjd7fh6epy6q26bdvi
Real-time through-wall imaging using an ultrawideband multiple-input multiple-output (MIMO) phased array radar system
2010
2010 IEEE International Symposium on Phased Array Systems and Technology
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A real-time acquisition and processing architecture has been developed for an ultrawideband (UWB) S-band (2-4 GHz) multiple-input multiple-output (MIMO) phased array radar system that facilitates greater ...
Experiments successfully image low radar cross section (RCS) objects, fast moving objects in free-space, and a human behind a 10 cm-thick solid concrete wall. ...
All antenna switches (SW1-4) are solid state and digitally controlled by the PC. ...
doi:10.1109/array.2010.5613314
fatcat:eozvpqzj2vfb3dif42ncdnpfsu
Multifrequency radar observations of clouds and precipitation including the G-band
2021
Atmospheric Measurement Techniques
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The field experiment, which coordinated an X-, Ka-, W- and G-band radar, revealed that the Ka–G pairing can generate differential reflectivity signal several decibels larger than the traditional Ka–W pairing ...
Observed peculiar radar reflectivity patterns also suggest that G-band radars could be used to gain insight into the melting behavior of small ice crystals. ...
Zeen Zhu, Samantha Nebylitsa, Jacob Segall and Kristofer Tuftedal for launching radiosondes from the SBRO. ...
doi:10.5194/amt-14-3615-2021
fatcat:54vw5ofisjbglapegfazcsn5tm
Experiment of Azimuth-invariant Bistatic UHF UWB SAR
2018
Journal of Physics, Conference Series
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Bistatic ultrahigh frequency ultrawideband synthetic aperture radar (UHF UWB SAR) has the well ability of the penetrating the foliage, high-resolution imaging and providing the increased information. ...
Bistatic image was obtained using the subaperture spectrumequilibrium method integrated with the fast factorized back projection algorithm (FFBPA). ...
Finally, we find that only a metallic sphere in the white circle is seen. ...
doi:10.1088/1742-6596/960/1/012037
fatcat:sve5www34zcfjl3ceecrguujge
MEASURED COMPLEX PERMITTIVITY OF WALLS WITH DIFFERENT HYDRATION LEVELS AND THE EFFECT ON POWER ESTIMATION OF TWRI TARGET RETURNS
2011
Progress in Electromagnetics Research B
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A modified radar range equation, which analytically accounts for the wall effects, including multiple reflections within a given homogeneous or layered wall, is then employed in conjunction with wideband ...
The results for various wall types, including drywall, brick, solid concrete, and cinder block, the latter two under both wet and dry conditions, are presented. ...
Approved for public release. Distribution unlimited. ...
doi:10.2528/pierb10091004
fatcat:cfrwxctkhnb23hypooxnk7etfu
EFFECTS OF INFLATED CONE ON SATELLITE'S RADAR CROSS SECTIONS IN S-BAND VIA FDTD SIMULATIONS
2015
Progress In Electromagnetics Research M
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The best strategy for satellite self-defense is orbit change. ...
In this study we examine the accuracy of a commercial FDTD code with a theoretical Mie scattering RCS, and use it to calculate the RCS of this so-called stealth satellite in the S-band, and analyze its ...
together with the Dorchia Communications Company, Taiwan, for providing a provisional license and technical assistance for the GEMS simulation software. ...
doi:10.2528/pierm15033102
fatcat:fii4s74ykbeedl46r4bdsqa6ry
Improvement in SNR by Adaptive Range Gates for RCS Measurements in the THz Region
2019
Electronics
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However, this method may not work to expectations, especially for targets with a large length-width ratio. This is because the effective target zone is dependent on the aspect angle. ...
One of the major concerns in radar cross-section (RCS) measurements is the isolation of the target echo from unwanted spurious signals. ...
(THz-TDS)-based systems and solid-state THz systems [7] [8] [9] [10] . ...
doi:10.3390/electronics8070805
fatcat:cfvtuqkgrvdf5n3mxxzuka37fa
Asteroid 16 Psyche: Shape, Features, and Global Map
2021
The Planetary Science Journal
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Using 30 calibrated radar echoes, we find Psyche's overall radar albedo to be 0.34 +/- 0.08 suggesting that the upper meter of regolith has a significant metal (i.e., Fe-Ni) content. ...
or CH/CB chondrites and peppered with localized regions of high metal concentrations. ...
ALMA is a partnership of ESO (representing its member states), NSF (USA), and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic ...
doi:10.3847/psj/abfdba
fatcat:v4elvtkxzbeddctnskp4lmmb4q
Scattering characteristics of high-resolution meteor head echoes detected at multiple frequencies
2002
Journal of Geophysical Research
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density sufficiently high that its plasma frequency exceeds the radar frequency (overdense reflection). ...
The primary sensor was the ARPA Long-Range Tracking and Instrumentation Radar (ALTAIR) radar operating at 160 MHz with 30 m range resolution and 422 MHz with 7.5 m range resolution, including both interferometric ...
This RCS value substantially exceeds the minimum detectable RCS of the S-band system and, if this were a metal target, the radar would have detected a signal. ...
doi:10.1029/2002ja009253
fatcat:wut2hiqadvh3hepvlugdgk5rzi
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